Uploaded score playback

I have a few questions regarding the playback of uploaded scores. I haven't uploaded any in order to experiment and find out the answers for myself, and I haven't a pro account.

1.) I understand that the whole FluidGM soundfont is available and will be honored accordingly as used in the Musescore program? So if a track uses "Piccolo" or "Acoustic Grand" it will play the appropriate instrument?

2.) Do the mixer settings per instrument saved to the score also apply the the uploaded score? If not, what is the default mix value for volume and pan?

3.) Dynamic markings (user defined velocities) are honored?

4.) If the Zita reverb unit is used on a file's synthesizer settings, is this also applied during online playback?

5.) Finally, will hidden "invisible" staves play like they do regularly in Musescore?

Thank you for future responses x_o